package com.example.skycode6.dao;

import com.example.skycode6.bean.AdminBean;
import com.example.skycode6.util.DBConnection;
import com.example.skycode6.util.Time;

import java.sql.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class AdminDao {
    DBConnection DBConn = new DBConnection();
    public boolean CheckLogin(String s1,String s2)
        throws SQLException{
        //conn对象代表数据路连接
        Connection conn = DBConn.getConn();
        Statement stmt = conn.createStatement();
        ResultSet rs = null;
        boolean OK = true;
        String sql ="select * from admin where "+"AdminName = '" + s1 + "' and " + "AdminPwd = '" + s2 +"'";
        rs = stmt.executeQuery(sql);
        if (!rs.next()){
            OK = false;
        }
        return OK;
    }
    public List<AdminBean> getList(int page) {
        Connection conn = DBConn.getConn();
        String sql = "select * from admin limit "+(page-1)*10+",10";
        List<AdminBean> list = new ArrayList<>();
        try {
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery(sql);
            while (rs.next()) {
                AdminBean AdminBean = new AdminBean();
                AdminBean.setAdminID(rs.getInt("adminID"));
                AdminBean.setAdminName(rs.getString("adminName"));
                AdminBean.setAdminPwd(rs.getString("adminPwd"));
                AdminBean.setAdminType(1);
                AdminBean.setLastLoginTime(Time.getDateTime());
                list.add(AdminBean);
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return list;
    }

    /**
     * @param adminBean 传入要更新的新闻对象,必须包含新闻id值
     * @return 收影响行数
     */
    public int update(AdminBean adminBean) {
        Connection conn = DBConn.getConn();
        if (adminBean.getAdminID() > 0) {
            try {
                Statement stmt = conn.createStatement();
                String sql = "update admin set adminPwd='" + adminBean.getAdminPwd() + "'"
                        + ",AdminType+'" + adminBean.getAdminType()+ "'"
                        + ",AdminLastLoginTime='" + Time.getDateTime() + "'"//更新时使用当前系统时间
                        + ",AdminName='" + adminBean.getAdminName() + "'"//使用添加的管理员名称
                        +"where AdminID='"+adminBean.getAdminID()+"'";
                return stmt.executeUpdate(sql);
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return 0;
        }
        return 0;
    }

    public int add(AdminBean adminBean) {
        Connection conn = DBConn.getConn();
        try {//使用预处理执行插入
            String sql = "insert into admin(AdminName,AdminPwd,AdminType,AdminLastLoginTime) values(?,?,?,?)";
            PreparedStatement pmst = conn.prepareStatement(sql);
            pmst.setString(1,adminBean.getAdminName());//将第一个参数设置为标题内容
            pmst.setString(2,adminBean.getAdminPwd());
            pmst.setString(3,(new Date()).toString());
            pmst.setString(4,"临时管理员");
            return pmst.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }
    /**
     * 删除功能
     */
    public int deleteNewsByAdminID(int adminID) {
        Connection conn = DBConn.getConn();
        String sql = "delete from admin where AdminID=?";
        try {
            PreparedStatement pmst = conn.prepareStatement(sql);
            pmst.setInt(1,adminID);
            return pmst.executeUpdate();
        } catch (SQLException e) {

        }
        return 0;
    }
    public int countPage(){
        Connection conn = DBConn.getConn();
        String sql = "select count(*) from admin";
        try {
            Statement statement = conn.createStatement();
            ResultSet rs = statement.executeQuery(sql);//获取查询结果集
            if (rs.next()) {
                return (rs.getInt(1)/10) +1;
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return 0;
    }
}
